3/8'' Eyelet copper lugs are used to connect power cables to accessories such as starters, alternators, inverters, switches, and more. The lugs are manufactured from pure grade copper tubing that has been stamped and formed. The cable end has a flared entry for easier cable insertion. The 3/8 inch stud copper lugs come in sizes to fit power cables from 6 awg through 4/O awg. The cable gauge size is stamped onto the lug for easy identification. Copper lugs can be attached to your power cable or battery cable by either soldering or crimping. A special tool such as a battery lug crimper or a hammer crimper is required. Soldering can be done using standard electrical solder, or by using our solder slugs.